board/common: add ID_LIKE, BUILD_ID and ARCHITECTURE to /etc/os-release

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

board/common/Config.in

@@ -18,6 +18,15 @@ config SIGN_KEY
 
 comment "Additional Artifacts"
 
+# For /etc/os-release, uses CondtionArchitechture= from systemd.unit(5)
+config INFIX_ARCH
+	string
+	default "arm"     if BR2_arm
+	default "arm64"   if BR2_aarch64
+	default "mips64"  if BR2_mips64
+	default "riscv64" if BR2_riscv
+	default "x86_64"  if BR2_x86_64
+
 menuconfig DISK_IMAGE
 	bool "Disk image"
 	help

board/common/post-build.sh

@@ -1,4 +1,9 @@
 #!/bin/sh
+. "$BR2_CONFIG"
+. "$TARGET_DIR/usr/lib/os-release"
+if [ -n "${ID_LIKE}" ]; then
+    ID="${ID} ${ID_LIKE}"
+fi
 
 GIT_VERSION=$(git -C $BR2_EXTERNAL_INFIX_PATH describe --always --dirty --tags)
 
@@ -9,8 +14,11 @@ rm "$TARGET_DIR/etc/os-release"
 	echo "NAME=\"Infix\""
 	echo "VERSION=${GIT_VERSION}"
 	echo "ID=infix"
+	echo "ID_LIKE=\"${ID}\""
 	echo "VERSION_ID=${GIT_VERSION}"
+	echo "BUILD_ID=\"${NAME} ${VERSION}\""
 	echo "PRETTY_NAME=\"Infix by KernelKit\""
+	echo "ARCHITECTURE=\"${INFIX_ARCH}\""
 	echo "HOME_URL=https://github.com/KernelKit"
 } > "$TARGET_DIR/etc/os-release"